31023223 has 12 divisors (see below), whose sum is σ = 39369672. Its totient is φ = 24173520.

The previous prime is 31023199. The next prime is 31023227. The reversal of 31023223 is 32232013.

It is not a de Polignac number, because 31023223 - 2⁵ = 31023191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023197 and 31023206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28240 + ... + 29317.

It is an arithmetic number, because the mean of its divisors is an integer number (3280806).

Almost surely, 2^31023223 is an apocalyptic number.

31023223 is a deficient number, since it is larger than the sum of its proper divisors (8346449).

31023223 is a wasteful number, since it uses less digits than its factorization.

31023223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57582 (or 57575 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 31023223 is about 5569.8494593660. The cubic root of 31023223 is about 314.2164889742.

Adding to 31023223 its reverse (32232013), we get a palindrome (63255236).

The spelling of 31023223 in words is "thirty-one million, twenty-three thousand, two hundred twenty-three".